;; mars !! ♡

To start this off I'm going to give you the colors I associate with them. Green for Big and Orange for Tankhun. (this is mostly on vibes, but I can give you reasons if you want them)

I tried to organise this a little, because otherwise this would be unreadable.

How would their relationship start?

They first bonded over their concerns about Tawan.  As soon as Tankun realizes that he’s falling in love with Big he would just get with the program. He wants this and he’s going to figure out how to make it happen if he can. they try to keep it a secret for a while but actually everyone knows and just allows them the illusion. they don’t fight about important things, but sometimes they get into petty arguments that last for a couple days. (Arm and Pol are always stuck between them and they deserve a couple days off, everyone tries to stay for away from them on these days.) Other people's reactions.

Kim and Kinn don’t have any problem with them being together, Big is one of the few bodyguards they can actually trust, so they’re just happy for their brother. They do threaten him but they really hope that they don’t have to make their threats come true. Once Tankhun called Big honey in front of Kinn just to see his reaction and Kinn promptly chokes on air. That was the one time Kim was glad he came home for dinner. Big's willingness to fight anyone that talks shit about Tankhun bc of his issues is very high and kinn had to stop him from fighting some guy, (who they have to make a deal with) who talked shit about Tankhun, at least once. All while he himself wants to fight that guy and this whole thing actually improves Kinn and Big's relationship. When the deal goes wrong they both team up to kill that guy. (Fun bonding activities with the in-law) Porsche’s and Big’s relationship would also be better because Big doesn’t feel jealous of Porsche. It helps that Porsche helps Tankhun with his fears.

Pet names

Things Tankhun calls big: (my dearest) darling, his bleeding heart, treasure of my heart, my raincloud and my thunderstorm when Big is grumpy about something small.

Things Big calls Tankhun: Love, Starlight. Starlight ties into my other Big headcanon where he is from a small town where the stars are really visible and it’s something he really misses in the city, but Tankhun brings enough light with him that he doesn’t need the stars anymore.

And all our other headcanons:

big writes Tankhun notes when he has to leave before Tankhun wakes up

Tankhun really likes to put his hands in Big’s hair

Big has a robe he uses when he sleep in Tankhun’s rooms

Big has a pair of heart shaped sunglasses he got from Tankhun and he wears them very seriously but only for Tankhun

Big gave Tankhun a scarf for one of his birthdays, that has a special spot in his closet

Tankhun gives Big forehead kisses before he leaves the compound.

Tankhun gave Big a necklace when they became official that Big wears at all times. (He chose a necklace because it can be easily hidden under his uniform where he can keep it safe.)

Big and Arm work together and have a secret code when talking that is specifically for when Tankhun is having a bad day or just misses Big so that he can get there

Tankhun puts in Big's earrings when they get ready together (either in the morning/for events)

Big actually really likes watching movies and series with Tankhun, because he likes how excited he gets, he still gets complaints for having no reaction to stuff but it's OK with him.

Big likes to put his head in Tankhun’s lap when he’s tired and they’re watching a movie.

Tankhun taught big how to put on makeup and now he does Tankhun’s makeup on bad days when he still wants to wear makeup

Tankhun makes Big play games with him and Big sucks at them. He does not get better with time, but he still has a good time because seeing Tankhun's joy at beating him makes him so happy.

Tankhun really likes giving Big back hugs, because he just wants to feel Big’s presence. Sometimes he just gives Big a hug when he’s talking to someone and Big just continues with the conversation.

Tankhun wears a hair tie around his wrist in case big needs one

Tankhun has really soft and steady hands => holding hands with him is also just a 15/10 experience

If they're sitting anywhere they're probably holding hands

They slow dance in the evenings on the balcony attached to Tankhun's rooms (Big hasn’t formally learned to dance, but he isn’t bad at it)